● Processes #include, #define, #if, macros○ Combines main source file with headers (textually)○ Defines and expands macros (token-based shorthand)○ Conditionally removes parts of the code (e.g. specialize for Linux, Mac, ...)● Removes all comments

To bundle this in your own code, use a Sass processor (not a Sass Svelte preprocessor, but a Sass processor)

If you rely on any external dependencies (files required in a preprocessor for example) you might want to watch these files for changes and re-run svelte compile. Webpack allows loader dependencies to trigger a recompile. svelte-loader exposes this API via options.externalDependencies.

JSX has the advantage of being fast, but the disadvantage that it needs to be preprocessed before working. By using template string virtual-html, we can have it work out of the box, and optimize it by writing a browserify transform. Best of both!

mdsvex is a Svelte preprocessor and is the preferred way to use this library.